Which of the following is an example of acceleration?

i. a car speeds up.
ii. a car slows down.
iii. a car travels in a straight line at a constant speed.

the dissociation of nickel hydroxide is follows:

the concentration of hydroxide ion is

the equilibrium constant value of nickel hydroxide is = 6.1 * 10^-^1^6 and thus equilibrium equation can be written as:

thus, concentration of ni is 0.23 * 10^-^4 mol /l